[lwip-devel] [bug #21643] udp_send/raw_send don't fail if netif is down

[Kieran Mansley]

Follow-up Comment #9, bug #21643 (project lwip):

It should be illegal to send any IP packet until the interface is up, so we
shouldn't need to special case broadcast or multicast.  This shouldn't impact
things like DHCP because they're not IP packets.  ARP is also not IP, so we
might need some way to prevent them as well, but are they really calling
through ip_output_if()?  That function sounds like it should be for IP packets
only.

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